Bostonworry is a Twitter feed that smushes together tweets from the Boston police and fire departments, local firefighters and MBTA police. Just the thing if you're the sort of person who momentarily freezes when you hear sirens to see if you can figure out where they're coming from and go check it out. For the full effect, turn your speakers up high and read it while you listen to live Boston Fire and EMS dispatches.

Ed. raises-hand note: OK, I just described myself there. If I'm missing any feeds that should be in that list, let me know.